/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.ranger.authorization.sqoop.authorizer;

import java.io.File;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.util.List;

import org.apache.ranger.admin.client.RangerAdminClient;
import org.apache.ranger.plugin.util.GrantRevokeRequest;
import org.apache.ranger.plugin.util.ServicePolicies;
import org.apache.ranger.plugin.util.ServiceTags;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

/**
 * A test implementation of the RangerAdminClient interface that just reads
 * policies in from a file and returns them
 */
public class RangerAdminClientImpl implements RangerAdminClient {
	private static final Logger LOG = LoggerFactory.getLogger(RangerAdminClientImpl.class);
	private static final String cacheFilename = "sqoop-policies.json";
	private Gson gson;

	@Override
	public void init(String serviceName, String appId, String configPropertyPrefix) {
		Gson gson = null;
		try {
			gson = new GsonBuilder().setDateFormat("yyyyMMdd-HH:mm:ss.SSS-Z").setPrettyPrinting().create();
		} catch (Throwable excp) {
			LOG.error("RangerAdminClientImpl: failed to create GsonBuilder object", excp);
		}
		this.gson = gson;
	}

	@Override
	public ServicePolicies getServicePoliciesIfUpdated(long lastKnownVersion, long lastActivationTimeInMillis)
			throws Exception {

		String basedir = System.getProperty("basedir");
		if (basedir == null) {
			basedir = new File(".").getCanonicalPath();
		}

		java.nio.file.Path cachePath = FileSystems.getDefault()
				.getPath(basedir, "/src/test/resources/" + cacheFilename);
		byte[] cacheBytes = Files.readAllBytes(cachePath);

		return gson.fromJson(new String(cacheBytes), ServicePolicies.class);
	}

	@Override
	public void grantAccess(GrantRevokeRequest request) throws Exception {

	}

	@Override
	public void revokeAccess(GrantRevokeRequest request) throws Exception {

	}

	@Override
	public ServiceTags getServiceTagsIfUpdated(long lastKnownVersion, long lastActivationTimeInMillis) throws Exception {
		return null;

	}

	@Override
	public List<String> getTagTypes(String tagTypePattern) throws Exception {
		return null;
	}

}